netdev - [PATCH 1/3] net: set FMODE

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Message-Id: <20230509151910.183637-2-axboe@kernel.dk>
Date: Tue,  9 May 2023 09:19:08 -0600
From: Jens Axboe <axboe@...nel.dk>
To: io-uring@...r.kernel.org
Cc: torvalds@...ux-foundation.org,
	Jens Axboe <axboe@...nel.dk>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	netdev@...r.kernel.org
Subject: [PATCH 1/3] net: set FMODE_NOWAIT for sockets

The socket read/write functions deal with O_NONBLOCK and IOCB_NOWAIT
just fine, so we can flag them as being FMODE_NOWAIT compliant. With
this, we can remove socket special casing in io_uring when checking
if a file type is sane for nonblocking IO, and it's also the defined
way to flag file types as such in the kernel.

Cc: "David S. Miller" <davem@...emloft.net>
Cc: Eric Dumazet <edumazet@...gle.com>
Cc: Jakub Kicinski <kuba@...nel.org>
Cc: netdev@...r.kernel.org
Signed-off-by: Jens Axboe <axboe@...nel.dk>
---
 net/socket.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/net/socket.c b/net/socket.c
index a7b4b37d86df..6861dbbfadb6 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -471,6 +471,7 @@ struct file *sock_alloc_file(struct socket *sock, int flags, const char *dname)
 		return file;
 	}
 
+	file->f_mode |= FMODE_NOWAIT;
 	sock->file = file;
 	file->private_data = sock;
 	stream_open(SOCK_INODE(sock), file);
-- 
2.39.2